3.5. Activity of defense-related metabolites of banana fruit treated with extracts of Zimmu and Z. scabra
Phenolic compounds, PAL, chitinase and b-1, 3-glucanase are inducible defense compounds that are involved in plant defense system against invading pathogen. The study on the changes in phenolic content due to the plant extract treatment indicated that the content of phenolics increased gradually up to 2 days after treatment and reached its peak on 3rd day. In general, the phenolic content was significantly higher in Zimmu leaf extract treated banana fruits compared to all other treatments (Fig. 3A). As that of Zimmu, Z. scabra treated banana hands had significantly higher phenolic content from 2 to 4 days after treatment compared to benomyl and pathogen alone inoculated control treatments. However, on fourth day, in all treatments including banana hands treated with Zimmu, there was decline in phenolic content.
The PAL activity also increased significantly in banana hands treated with Zimmu from first to fourth day after treatment compared to other treatments. The PAL activity reached its maximum on the third day following treatment and then declined on 4th day (Fig. 3B). In pathogen alone inoculated control, there was a slight increase in the accumulation of phenolic compounds andPAL compared to uninoculated control.
The accumulation of PR-proteins such as chitinase (up to 2.6- fold) and b-1,3-glucanase (up to 2.5-fold) was significantly higher in banana hands treated with leaf extract of Zimmu compared to other treatments (Fig 3C and Fig 3D). Similar to PAL, the activity of chitinase and b-1, 3-glucanase also gradually increased fromfirst day after treatment and reached their peak at the 3rd day after treatment before declining.
3.5. Activity of defense-related metabolites of banana fruit treated with extracts of Zimmu and Z. scabra
Phenolic compounds, PAL, chitinase and b-1, 3-glucanase are inducible defense compounds that are involved in plant defense system against invading pathogen. The study on the changes in phenolic content due to the plant extract treatment indicated that the content of phenolics increased gradually up to 2 days after treatment and reached its peak on 3rd day. In general, the phenolic content was significantly higher in Zimmu leaf extract treated banana fruits compared to all other treatments (Fig. 3A). As that of Zimmu, Z. scabra treated banana hands had significantly higher phenolic content from 2 to 4 days after treatment compared to benomyl and pathogen alone inoculated control treatments. However, on fourth day, in all treatments including banana hands treated with Zimmu, there was decline in phenolic content.
The PAL activity also increased significantly in banana hands treated with Zimmu from first to fourth day after treatment compared to other treatments. The PAL activity reached its maximum on the third day following treatment and then declined on 4th day (Fig. 3B). In pathogen alone inoculated control, there was a slight increase in the accumulation of phenolic compounds andPAL compared to uninoculated control.
The accumulation of PR-proteins such as chitinase (up to 2.6- fold) and b-1,3-glucanase (up to 2.5-fold) was significantly higher in banana hands treated with leaf extract of Zimmu compared to other treatments (Fig 3C and Fig 3D). Similar to PAL, the activity of chitinase and b-1, 3-glucanase also gradually increased fromfirst day after treatment and reached their peak at the 3rd day after treatment before declining.
การแปล กรุณารอสักครู่..
